无法在Azure中创建服务SAS

Question

我想为Azure中的Blob存储创建服务SAS。参数为：

• url =（这是从容器属性中获取的URL）
• sv = 2019-02-02
• se = 2020-02-02
• sr = b
• sp = rw
• spr = https
• sig = YDiaihib7 + cRay768bmfri2Z4t / kBhv8uxUGzWw5Dg4 =

使用以下bash脚本计算签名：

    StringToSign="signedversion\nsignedexpiry\nsignedResource\nsignedpermissions\nsignedProtocol"
    echo -e $StringToSign| openssl dgst -sha256 -hmac secret -binary | base64

StringToSign变量的值为：

echo -e $StringToSign
signedversion
signedexpiry
signedResource
signedpermissions
signedProtocol

echo $StringToSign
signedversion\nsignedexpiry\nsignedResource\nsignedpermissions\nsignedProtocol

结果URI为：

URL / backup？sv = 2019-02-02＆se = 2020-02-02＆sr = b＆sp = rw＆spr = https＆sig = YDiaihib7 + cRay768bmfri2Z4t / kBhv8uxUGzWw5Dg4 =

和响应：

<Error>
<Code>AuthenticationFailed</Code>
<Message>
Server failed to authenticate the request. Make sure the value of Authorization header is formed correctly including the signature. RequestId:<...> Time:<...>
</Message>
<AuthenticationErrorDetail>Signature fields not well formed.</AuthenticationErrorDetail>
</Error>

这里出了什么问题？

谢谢！